Feank c



(No Model.)

F. G. DUMAS.

SPRING HINGE,

Patented 001;. 11, 1887.

AMMAL 19. 5mm

INVBNTOR BY A /= TTORNEY Lithngmphnr, Washlnghn. n. c.

UNITED STATES PATENT OFFICE.

FRANK O. DUMAS, OF NEWV YORK, N. Y.

SPRING- HINGE.

SPBCIPIC'ATION forming part of Letters Patent No. 371,308, dated October 11, 1887.

Application filed December 23, 1886. Serial No. 222.426. (N0 model.)

To all whom it may concern.-

Be it known that I, FRANK G. Dorms, a citizen of the United States, residing in the city, county, and State of New York, have invented a certain new and useful Improvement in SpringHinges; and I do hereby dc clare the following to be a full, clear, and exact description of said invention, which will enable others skilled in the art to which it appertains to make and use the same.

Heretofore spring-hinges have been made in two or more pieces composed of solid parts of metal manufactured separately from the spring and afterward put together, and the cost of making them compared with the cost of my invention has been very large. p The object of my invention is the manufacture ofa spring-hinge ofone entire and conti nuous piece of wire, composing the leaves or butts and the spring and pintle of the hinge, and by this simplicity of manuiacturelargely reducing the cost ofproduction ofaserviceable spring-hinge and cheapening them for sale.

In the accompanying drawings, illustrating my invention, Figure 1 shows one continuous wire having a spiral, B, turned on it, with the ends 0 of which my hinge is formed. Fig. 2 shows the same wire, 0, with spiral or spring 13, and its formation, as hereinafter described, into one-half of the hinge, and the rings or eyes A A A, forming the screw-holes for fastening said hinge, and the insertion of one end of said wire at the point D, secured into the interior of the spiral or spring B. Fig. 3 shows the spring-hinge complete, with both ends of the wire inserted and secured at the points D D into the interior of the spiral or spring.

Like letters in the figures indicate the same parts.

My invention consists of a piece of wire on which a spiral spring is turned in the middle, part of the wire. The ends of said wire run-\ ning from the ends of said spring are then bent over horizontal1y,or nearly so,to the line of said spring, the top end to the right and the lower end to the left or opposite direction. The upper end,at about an inch or more from the spring, (the distance varying according to size of hinge,) is then bent or twisted to form a ring or eye to serve as a screw-hole for 'fastening, and the said wire is then carried downward parallel with the spring to a point opposite the middle of said spring, where said wire is again bent or twisted to form another ring-or eye for a screw-hole. Thence the wire is carried downward and another ring or eye for a screw-hole is bent at the same distance from the last as that is from the first eye or screw-hole, and from this point (forming the lower right-hand corner of the hinge) the wire is bent to the left at right angles (or nearly so) with the last direction and carried to a point opposite the interior of the spiral or spring,and the end ofthe wire is bent upward and inserted and secured into the interior of the spiral spring. The lower end of said wire running from the lower end of the spiral, which has been bent over to the left,is then,at an inch or more from the spring, bent or twisted into a screw-hole at and forms the lower left-hand corner of the hinge, and thence it is carried upward parallel with the spring, and screwholes are made, in the manner described, in the middle and the upper left-hand corner of the hinge, and the wire is then bent over to the right and carried to a point opposite the interior of the upper end of said spiral spring, and it is then bent downward and inserted and secured into the interior of said spiral or spring at its upper end. This forms a complete and serviceable spring-hinge, and can be put up to hang doors, &c., as ordinary hinges are, with screws through the eyes or rings, as described.

The number of eyes for screws may be increased if the size of the hinge'requires it. The eyes may also be made by twisting the wire to cross itself where the wire used is small. The strength of the spring may also be reduced by lessening or dividing the coil of the spiral and using a small coil at the up per and a small coil at the lower end of the hinge.

Having thus fully described my invention, what I desire to claim and secure by Letters Patent is- 1. A spring-hinge composed of a spiral 7 spring forming the hinge pintle or piv0t,oominterior of the coil of the spring, the whole bined with the leaves or hinge-butts, all made forming a hinge of one continuous piece of 10 together of one continuous piece of wire. wire, substantially as described.

2. The combination of a spiral spring with 5 the leaves or hinge-butts made of one single FRANK DUMAS' piece of wire, and provided with eyes or rings \Vitnesses: serviceable as screw-holes, and with the ends HARRY B. SPARKS, of the wire inserted into and secured in the JAs. B. KILSI-IEIMER. 

